When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows cannot open this file:

example.wvm

To open this file, Windows needs to know what program you want to use to open it...

Can I change the extension of files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.

So you’d better convert WVM to MP4 with a professional video converter for more usages like playing on iPhone, iPad, Samsung, TV, Xbox, PS3/PS4, Plex, etc.

Handbrake seemed on its last legs back in 2006 when the software’s initial creator, Eric Petit, dropped off the face of the Earth, but development carried on with the help of a few ambitious folk who were driven to update and revise the existing software for a changing world. The open-source video converter now boasts one of the most expansive software packages for ripping and converting video files for playback on number of popular devices such as iPods, AppleTV, and Android tablets. The interface is sleek and well-designed, yet intimidating, offering a variety of customizable, borderline-advanced features that take a bit of getting used to before you can really capitalize on their capabilities and intuitive uses. However, the HandBrake guide and forums are always available if you need help without having to spend ample time fumbling with the program.

Handbrake also doesn’t feature any ads or bundled malware – a welcome touch – but conversion speeds can drag and the software isn’t light on system resources. Other noteworthy features include an abundance of video editing tools for splicing, adjusting framerate, and adding subtitles and assorted video effects before viewing the results in a live preview window. Experienced users can even queue multiple encodes for quicker batch processing and expedited results sans tedious manual input. Handbrake simply can’t be topped when converting files to MP4 or MKV format, but it also isn’t for beginners unwilling to learn the software.

Pavtube Video Converter is best all-in-one video converter for Mac to convert, edit and preview videos. It has an excellent compatibility of various formats like SD/HD/4K UHD MP4 and other, H.264, H.265, MKV, AVI, WMV, MOV, VOB, etc. You can convert any media with this Mac media converter in perfect quality (even in high-definition or 3D) no missing key frames, redraw issues, or crashes. Besides, this powerful video converter can encode your media files to a smart TV for streaming and playback directly with Samsung/Sony/Panasonic/LG TV presets supported.

Step 1. Click "Add video" button to add your video files to the program. Or directly drag the video you want to convert to the left item bar.

Step 2. Set right output format. Click "Format" bar, and select .mp4 from "Common video" or "HD video" or “3D”.

Tips: The default settings may not satisfy you, and you can click the "Settings" button to change the settings by yourself including video resolution, bit rate, audio sample rate, audio channel etc. for full screen playback smoothly. Or keep no changes, which is also a good choice.

Step 3. Click the "Convert" button on the main interface and the software will start to convert to friendly video formats immediately. When the conversion finishes, click "Open" to find the converted video files.

For a variety of reasons, there will be times that you need to convert video to H.264 MP4 format. For instance, you've saved plenty of MKV files but want to enjoy them on MP4-compatible player, portable devices etc. Usually, you'll count on Handbrake to convert video to H.264 MP4 format for free. This following Handbrake tutorial will somehow help you.

Part 1. Step-by-step guide to convert video to H.264 MP4 with HandBrake:

Make sure you have downloaded Handbrake software program online and install it to your computer before proceeding.

1. Import files- you can then launch the program and browse to the folder where the video files are stored. By double-clicking on any file, it will be added and you can view all the related information like length.

2. Output format the only choice you will have in this one is setting the output format as MP4. There is an opportunity to tweak your output format if you so wish.

3.Start conversion- this will be actualized by clicking on the "Start" button and you can track the process constantly.

Why Handbrake will Crash When Converting video to MP4 and How to Solve It?

Solution One: Make sure your Handbrake is up to date. Since Handbrake have fixed some campatible issues when converting videos like AVI. And HandBrake 0.10.2 is latest version by far.

Solution Two: If you encounter crash problem when converting videos to MP4 with Handbrake, then you can go into the "audio & subtitles" tab. There should be 2 tracks shown. Go into source on the track 2 and select none. This solution is recommended by Macrumours User.

Although Handbrake is free of charge, there are still many Handbrake errors like Handbrake no valid title found, Handbrake audio and video out of sync, etc. Worse still, the supported output formats are only confined to MP4 and MKV, making you inconvenient to convert videos. In this case, you need a Handbrake alternative like Pavtube Video Converter Ultimate to convert any videos to MP4 format to resolve the Handbrake errors. With up to 250+ video and audio codecs infused, this alternative to Handbrake can convert among H.265,HD MKV, MTS, M2TS, AVCHD, AVI, FLV, MOV, WMV, MPEG, YouTube video, Torrent video, even DVD, Blu-ray, ISO etc to H.264 MP4 format for playing on portable devices like iPhone, iPad and Android etc.

Operating this alternative of Handbrake is quite simple when converting MP4 to AVI. Just four easy steps.

Tips: The default settings may not satisfy you, and you can click the "Settings" button to change the settings by yourself including video resolution, bit rate, audio sample rate, audio channel etc. for full screen playback smoothly. Or keep no changes, which is also a good choice.

Step 3. Click the "Start conversion" button on the main interface and the software will start to convert video to MP4 formats immediately. When the conversion finishes, click "Open" to find the converted video files.